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 A176764 Smallest power of 4 whose decimal expansion contains n. 10
 1, 256, 16384, 4, 256, 16, 1048576, 16384, 4096, 1024, 1099511627776, 1125899906842624, 1180591620717411303424, 262144, 288230376151711744, 16, 17179869184, 1073741824, 4194304, 72057594037927936, 262144, 4722366482869645213696 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS This is to 4 as A176763 is to 3 and as A030001 is to 2. LINKS FORMULA a(n) = MIN{A000302(i) such that n in decimal representation is a substring of A000302(i)}. a(n) = 4^A062521(n). - Michel Marcus, Sep 30 2014 EXAMPLE a(1) = 1 because 4^0 = 1 has "1" as a substring (not a proper substring, though). a(2) = 256 because 4^4 = 256 has "2" as a substring. a(3) = 16384 because 4^7 = 16384 has "3" as a substring. CROSSREFS Cf. A000302, A030001, A176763, A176765-A176773. Sequence in context: A224283 A224206 A238064 * A235964 A206319 A216397 Adjacent sequences:  A176761 A176762 A176763 * A176765 A176766 A176767 KEYWORD base,easy,nonn AUTHOR Jonathan Vos Post, Apr 25 2010 EXTENSIONS Corrected and extended by Sean A. Irvine and Jon E. Schoenfield, May 05 2010 STATUS approved

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Last modified October 17 19:18 EDT 2019. Contains 328127 sequences. (Running on oeis4.)